**Formula for area of a rectangle: **b x h (base x height)

**Formula for area of a triangle: ** x b x h

While perimeter is measured in units of length, area is measured in units squared.

Objects with the same perimeter can have different areas.

Area does NOT equal length plus width.

**Study and practice**

- Quiz yourself on finding the area of a rectangleThis page from mathopenref.com explains how to find the area of a rectangle and then allows you to design rectangles and find their area. (NOTE: If the virtual manipulative does not work for you, try clicking the "full screen" button.)
- Quiz yourself on finding the area of a triangleThis page from mathopenref.com shows you how to find the altitude (height) of a triangle and how to calculate the area. You can test knowledge by designing triangles and finding their area. (NOTE: If you have trouble with the manipulative, try clicking the "full screen" button.)

0.00 min addition (+), subtraction (-), multiply (x), divide (÷)

1.19 min decimal point

2.43 min C, CE and backspace

4.19 min square, square root & fractions

6.17 min percentage (%)

UCOL is part of Te Pūkenga - New Zealand Institute of Skills and Technology Learn More

Learn with purpose